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Method for preparing manganese dioxide nano rod at low temperature

A technology of manganese dioxide and nanorods, applied in the direction of manganese oxide/manganese hydroxide, nanotechnology, etc., can solve the problems of complex process, high temperature, high cost, etc., and achieve the effect of high purity, low cost, simple process and easy operation

Inactive Publication Date: 2011-05-25
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These methods require higher temperature, and the cost is high and the process is complicated

Method used

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  • Method for preparing manganese dioxide nano rod at low temperature
  • Method for preparing manganese dioxide nano rod at low temperature
  • Method for preparing manganese dioxide nano rod at low temperature

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 0.06 moles of manganese chloride tetrahydrate (MnCl 2 4H 2 O), 0.03 mol potassium permanganate (KMnO 4 ) after mixing evenly, then dissolved in 200 ml of distilled water. During the dissolution process, continuous stirring is required to accelerate the dissolution rate of the reactants. After the reactants were completely dissolved in water, 100 ml of 1M HCl solution was slowly added under continuous stirring to accelerate the reaction rate of the reactants. Finally, the mixed solution was placed in a constant temperature water bath at 60° C., kept warm for 36 hours, and then cooled to room temperature. The precipitate was washed by centrifugation with deionized water several times until the pH value was neutral, and dried at room temperature to obtain a black powdery product. The XRD diffraction pattern of sample ( figure 1 shown) confirmed that the product is orthorhombic γ-MnO 2 , the resulting XRD pattern is consistent with that of the reference MnO 2 The sta...

Embodiment 2

[0020] 0.06 moles of manganese chloride tetrahydrate (MnCl 2 4H 2 O), 0.02 mol potassium permanganate (KMnO 4 ) after mixing evenly, then dissolved in 200 ml of distilled water. During the dissolution process, continuous stirring is required to accelerate the dissolution rate of the reactants. After the reactants were completely dissolved in water, 100 ml of 1M HCl solution was slowly added under continuous stirring to accelerate the reaction rate of the reactants. Finally, the mixed solution was placed in a constant temperature water bath at 80° C., kept warm for 24 hours, and then cooled to room temperature. The precipitate was washed by centrifugation with deionized water several times until the pH value was neutral, and dried at room temperature to obtain a black powdery product. The appearance of product, structure etc. are all similar to embodiment 1.

Embodiment 3

[0022] 0.06 moles of manganese chloride tetrahydrate (MnCl 2 4H 2 O), 0.015 mol potassium permanganate (KMnO 4 ) after mixing evenly, then dissolved in 200 ml of distilled water. During the dissolution process, continuous stirring is required to accelerate the dissolution rate of the reactants. After the reactants were completely dissolved in water, 100 ml of 1M HCl solution was slowly added under continuous stirring to accelerate the reaction rate of the reactants. Finally, the mixed solution was placed in a constant temperature water bath at 70° C., kept warm for 36 hours, and then cooled to room temperature. The precipitate was washed by centrifugation with deionized water several times until the pH value was neutral, and dried at room temperature to obtain a black powdery product. The appearance of product, structure etc. are all similar to embodiment 1.

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Abstract

The invention relates to a method for preparing an inorganic material, in particular to a method for preparing a manganese dioxide (MnO2) nano rod. The method comprises the following steps of: mixing manganese chloride tetrahydrate and potassium permanganate uniformly, and dissolving the mixture into distilled water till full dissolution; adding HCl solution to react, putting the mixed reaction solution into a thermostatic water bath, preserving the heat for over 24 hours, and cooling to room temperature to obtain sediment; and finally, centrifugally cleaning the sediment for multiple times by using deionized water till the pH value is neutral, and drying the sediment at room temperature to obtain the high-purity manganese dioxide nano rod. The method has the advantages that: the reagents are commercial products, fussy preparation is not needed, the process is simple and easy to operate, the cost is low, and the prepared product has high purity and can be produced in large batch.

Description

technical field [0001] The present invention relates to the preparation method of inorganic material, specifically refers to a kind of manganese dioxide (MnO 2 ) Preparation method of nanorods. Background technique [0002] It is well known that manganese dioxide (MnO 2 ) is a very stable amphoteric oxide at room temperature. Manganese dioxide is widely used in steelmaking, and in glass, ceramics, enamel and dry batteries. In recent years, studies have found that manganese dioxide has excellent catalytic and electrochemical properties. Manganese dioxide is now widely used in toxic organic catalysts and capacitor manufacturing industries. Since the manganese dioxide nanorod has a higher specific surface area and more channels, it has better performance in its application field. So far used to prepare MnO 2 The methods of nanorods mainly include thermal decomposition method, gas / solid reaction method, sol-gel method, hydrothermal synthesis method and electrochemical meth...

Claims

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Application Information

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IPC IPC(8): C01G45/02B82Y40/00
Inventor 李培刚雷鸣王顺利朱晖文沈静琴唐为华
Owner ZHEJIANG SCI-TECH UNIV
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